Telephony: a detailed exposition of the telephone exchange systems of the british post office Vol.2/
Atkinson,J.
Telephony: a detailed exposition of the telephone exchange systems of the british post office Vol.2/ J.Atkinson. - 1st ed. - London: Sir Isaac Pitman & Sons, c1950 - xii,873p.: illus.; 25cm.
Includes index.
Automatic exchange systems.
1 . Telephoney.
2 . Electrical and electronic engineerig.
621.385/ ATT
Telephony: a detailed exposition of the telephone exchange systems of the british post office Vol.2/ J.Atkinson. - 1st ed. - London: Sir Isaac Pitman & Sons, c1950 - xii,873p.: illus.; 25cm.
Includes index.
Automatic exchange systems.
1 . Telephoney.
2 . Electrical and electronic engineerig.
621.385/ ATT